FreeBSD/Linux Kernel Cross Reference
sys/net/ppp_defs.h
1 /* $NetBSD: ppp_defs.h,v 1.8 2002/09/13 14:32:11 itojun Exp $ */
2 /* Id: ppp_defs.h,v 1.11 1997/04/30 05:46:24 paulus Exp */
3
4 /*
5 * ppp_defs.h - PPP definitions.
6 *
7 * Copyright (c) 1989-2002 Paul Mackerras. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The name(s) of the authors of this software must not be used to
22 * endorse or promote products derived from this software without
23 * prior written permission.
24 *
25 * 4. Redistributions of any form whatsoever must retain the following
26 * acknowledgment:
27 * "This product includes software developed by Paul Mackerras
28 * <paulus@samba.org>".
29 *
30 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
31 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
32 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
33 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
34 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
35 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
36 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
37 */
38
39 #ifndef _NET_PPP_DEFS_H_
40 #define _NET_PPP_DEFS_H_
41
42 /*
43 * The basic PPP frame.
44 */
45 #define PPP_HDRLEN 4 /* octets for standard ppp header */
46 #define PPP_FCSLEN 2 /* octets for FCS */
47
48 /*
49 * Packet sizes
50 *
51 * Note - lcp shouldn't be allowed to negotiate stuff outside these
52 * limits. See lcp.h in the pppd directory.
53 * (XXX - these constants should simply be shared by lcp.c instead
54 * of living in lcp.h)
55 */
56 #define PPP_MTU 1500 /* Default MTU (size of Info field) */
57 #define PPP_MAXMTU 65535 - (PPP_HDRLEN + PPP_FCSLEN)
58 #define PPP_MINMTU 64
59 #define PPP_MRU 1500 /* default MRU = max length of info field */
60 #define PPP_MAXMRU 65000 /* Largest MRU we allow */
61 #define PPP_MINMRU 128
62
63 #define PPP_ADDRESS(p) (((u_char *)(p))[0])
64 #define PPP_CONTROL(p) (((u_char *)(p))[1])
65 #define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
66
67 /*
68 * Significant octet values.
69 */
70 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
71 #define PPP_UI 0x03 /* Unnumbered Information */
72 #define PPP_FLAG 0x7e /* Flag Sequence */
73 #define PPP_ESCAPE 0x7d /* Asynchronous Control Escape */
74 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
75
76 /*
77 * Protocol field values.
78 */
79 #define PPP_IP 0x0021 /* Internet Protocol */
80 #define PPP_ISO 0x0023 /* ISO OSI Protocol */
81 #define PPP_XNS 0x0025 /* Xerox NS Protocol */
82 #define PPP_AT 0x0029 /* AppleTalk Protocol */
83 #define PPP_IPX 0x002b /* IPX protocol */
84 #define PPP_VJC_COMP 0x002d /* VJ compressed TCP */
85 #define PPP_VJC_UNCOMP 0x002f /* VJ uncompressed TCP */
86 #define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */
87 #define PPP_COMP 0x00fd /* compressed packet */
88 #define PPP_IPCP 0x8021 /* IP Control Protocol */
89 #define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
90 #define PPP_IPXCP 0x802b /* IPX Control Protocol */
91 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
92 #define PPP_CCP 0x80fd /* Compression Control Protocol */
93 #define PPP_LCP 0xc021 /* Link Control Protocol */
94 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
95 #define PPP_LQR 0xc025 /* Link Quality Report protocol */
96 #define PPP_CHAP 0xc223 /* Crypto Handshake Auth. Protocol */
97 #define PPP_CBCP 0xc029 /* Callback Control Protocol */
98
99 /*
100 * Values for FCS calculations.
101 */
102 #define PPP_INITFCS 0xffff /* Initial FCS value */
103 #define PPP_GOODFCS 0xf0b8 /* Good final FCS value */
104 #define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
105
106 /*
107 * A 32-bit unsigned integral type.
108 */
109 #if !defined(__BIT_TYPES_DEFINED__) && !defined(_BITYPES) && !defined(__FreeBSD__)
110 #ifdef UINT32_T
111 typedef UINT32_T u_int32_t;
112 #else
113 typedef unsigned int u_int32_t;
114 #endif
115 #endif
116
117 /*
118 * Extended asyncmap - allows any character to be escaped.
119 */
120 typedef u_int32_t ext_accm[8];
121
122 /*
123 * What to do with network protocol (NP) packets.
124 */
125 enum NPmode {
126 NPMODE_PASS, /* pass the packet through */
127 NPMODE_DROP, /* silently drop the packet */
128 NPMODE_ERROR, /* return an error */
129 NPMODE_QUEUE /* save it up for later. */
130 };
131
132 /*
133 * Statistics.
134 */
135 struct pppstat {
136 unsigned int ppp_ibytes; /* bytes received */
137 unsigned int ppp_ipackets; /* packets received */
138 unsigned int ppp_ierrors; /* receive errors */
139 unsigned int ppp_obytes; /* bytes sent */
140 unsigned int ppp_opackets; /* packets sent */
141 unsigned int ppp_oerrors; /* transmit errors */
142 };
143
144 struct vjstat {
145 unsigned int vjs_packets; /* outbound packets */
146 unsigned int vjs_compressed; /* outbound compressed packets */
147 unsigned int vjs_searches; /* searches for connection state */
148 unsigned int vjs_misses; /* times couldn't find conn. state */
149 unsigned int vjs_uncompressedin; /* inbound uncompressed packets */
150 unsigned int vjs_compressedin; /* inbound compressed packets */
151 unsigned int vjs_errorin; /* inbound unknown type packets */
152 unsigned int vjs_tossed; /* inbound packets tossed because of error */
153 };
154
155 struct ppp_stats {
156 struct pppstat p; /* basic PPP statistics */
157 struct vjstat vj; /* VJ header compression statistics */
158 };
159
160 struct compstat {
161 unsigned int unc_bytes; /* total uncompressed bytes */
162 unsigned int unc_packets; /* total uncompressed packets */
163 unsigned int comp_bytes; /* compressed bytes */
164 unsigned int comp_packets; /* compressed packets */
165 unsigned int inc_bytes; /* incompressible bytes */
166 unsigned int inc_packets; /* incompressible packets */
167 unsigned int ratio; /* recent compression ratio << 8 */
168 };
169
170 struct ppp_comp_stats {
171 struct compstat c; /* packet compression statistics */
172 struct compstat d; /* packet decompression statistics */
173 };
174
175 /*
176 * The following structure records the time in seconds since
177 * the last NP packet was sent or received.
178 */
179 struct ppp_idle {
180 time_t xmit_idle; /* time since last NP packet sent */
181 time_t recv_idle; /* time since last NP packet received */
182 };
183
184 #ifndef __P
185 #ifdef __STDC__
186 #define __P(x) x
187 #else
188 #define __P(x) ()
189 #endif
190 #endif
191
192 #endif /* _NET_PPP_DEFS_H_ */
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